1231000323131 has 2 divisors, whose sum is σ = 1231000323132. Its totient is φ = 1231000323130.

The previous prime is 1231000323103. The next prime is 1231000323173. The reversal of 1231000323131 is 1313230001321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231000323131 - 2⁶ = 1231000323067 is a prime.

It is a super-2 number, since 2×1231000323131² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231000023131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615500161565 + 615500161566.

It is an arithmetic number, because the mean of its divisors is an integer number (615500161566).

Almost surely, 2^{1231000323131} is an apocalyptic number.

1231000323131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231000323131 is an equidigital number, since it uses as much as digits as its factorization.

1231000323131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1231000323131 its reverse (1313230001321), we get a palindrome (2544230324452).

The spelling of 1231000323131 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-three thousand, one hundred thirty-one".